Postfix start errors

I tried to carefully follow the tutorial for intstalling ispconfig 3 on Centos 5.4/ When I was finished everything worked great, except email. I configured an email domain and an address using ISPConfig, but no luck sending or receiving

I notice that when I start or restart postfix I am first getting this error:
May 4 18:45:55 webserver2 postfix/master[12788]: daemon started -- version 2.3.3, configuration /etc/postfix
May 4 18:46:09 webserver2 imapd: Failed to create cache file: maildirwatch ([email protected])
May 4 18:46:09 webserver2 imapd: Error: No such file or directory

Following this, the email system simply doesnt work:

Then while doing 'tail -f /var/log/maillog' I tried to check for mail using a remote imap mail client (thunderbird):
May 4 18:20:16 webserver2 postfix/smtpd[6941]: connect from unknown[xxx.xxx.xxx.xxx]
May 4 18:20:16 webserver2 postfix/smtpd[6941]: disconnect from unknown[xxx.xxx.xxx.xxx]

The output you asked for is below, but in the meantime I think I've messed up everything. I was running ispconfig 3.0.16 and decided to update to 3.0.21. Now the ispconfig web interface address (mydomain.com:8080) results in a blank page.

The output you asked for is below, but in the meantime I think I've messed up everything. I was running ispconfig 3.0.16 and decided to update to 3.0.21. Now the ispconfig web interface address (mydomain.com:8080) results in a blank page.

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Ok. Then we should check this first. Please take a look into the apache error log file.

The output for the /var/vmail directory is ok.

By the way, why did you use centos for the install? Debian, which is the recommended linux distribution fo ispconfig, is much easier to setup. Centos is more for linux cracks which dont care if the have to compile everything manually as centos lacks a lot of software.

On the upgrade of ispconfig, it seemed to leave some files with incorrect ownership. I changed /interface/lib/classes/plugin.inc.php from being owned by root to ispconfig:ispconfig and the site seems to be working again. Could all files in the ispconfig folder safely be chowned to ispconfig:ispconfig?

In the interest of putting together a stable system, we are just about ready to give up on getting Centos to work and starting over with Debian, or perhaps the latest Ubuntu server, based on the 'How-to' that Falko published yesterday. Any thoughts, opinions or suggestions on this?

In the interest of putting together a stable system, we are just about ready to give up on getting Centos to work and starting over with Debian, or perhaps the latest Ubuntu server, based on the 'How-to' that Falko published yesterday. Any thoughts, opinions or suggestions on this?

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As we test on Debian most of the time, Debian would be the best choice in my opinion. Ubuntu is good as well, as it is based on Debian, but from my experience Debian seems a little more stable...